json dumps vs flask jsonify

Question

I am not sure I understand the purpose of the flask jsonify method  I try to make a JSON string from this   data     id   str album id    title   album title    but what I get with json dumps differs from what I get with flask jsonify   json dumps data      id    4ea856fd6506ae0db42702dd    title    Business    flask jsonify data     id        title         Obviously I need to get a result that looks more like what json dumps returns  What am I doing wrong

User · Accepted Answer

The jsonify   function in flask returns a flask Response   object that already has the appropriate content-type header  application json  for use with json responses  Whereas  the json dumps   method will just return an encoded string  which would require manually adding the MIME type header   See more about the jsonify   function here for full reference   Edit  Also  I ve noticed that jsonify   handles kwargs or dictionaries  while json dumps   additionally supports lists and others

User · Answer

You can do   flask jsonify   data    or  flask jsonify id str album id   title album title

User · Answer

The choice of one or another depends on what you intend to do   From what I do understand    jsonify would be useful when you are building an API someone would query and expect json in return  E g  The REST github API could use this method to answer your request  dumps  is more about formating data python object into json and work on it inside your application  For instance  I need to pass an object to my representation layer where some javascript will display graph  You ll feed javascript with the Json generated by dumps

User · Answer

consider  data   fld   hello     now   jsonify data    will yield   fld   hello   and   json dumps data    gives     lt html gt  lt body gt  lt p gt   fld   hello   lt  p gt  lt  body gt  lt  html gt

User · Answer

This is flask jsonify    def jsonify  args    kwargs       if   debug             assert have json       return current app response class json dumps dict  args    kwargs           indent None if request is xhr else 2   mimetype  application json     The json module used is either simplejson or json in that order  current app is a reference to the Flask   object i e  your application  response class   is a reference to the Response   class

[python] json.dumps vs flask.jsonify

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